Timing index



July 10, 1923 11,461,673

' I v. w. PAG

TIMING INDEX Filed June 2, 1921 WITNESSES lIVI/ENTOR ATTORNEYS ings, thereference character gear shaft 9. This shaft Pfifited an in, was.

rattan truce.

VICTOR w. PAGE, or KEW GARDENS, NEW YORK, n. Y.

TIMING INDEX.

Application filed June 2,

To all whom it may concern:

Be it known that I, VIo'roR W. PAoii, a citizen of the United States,and a resident of the city of New York, Kew GardensQborough of Queens,in the county of Queens and State of New 'York, have invented a new andImproved Timing Index, of which the following is a full, clear. andexact description.

he present invention relates to new and useful improvements in internalcombustion motors, and it pertains more particularly to means forindicating the relative position of the cam shaft and its drivingmechanism to the crank shaft of the motor.

In order that the several valves of the motor may operate at the propertime, a relative timing of the cam shaft and the crank shaft isnecessary. When the cam shaft and its assembly have been removed greatdifliculty is experienced in correctly positioning the several partsthereof in order that proper timing between the cam, shaft and crankshaft may be had.

It is one of the objects of the invention to provide means whereby theseveral parts of the cam shaft and its assembly may be properlypositioned, in order that when the connection between the crank shaftand the cam shaft is made, the several parts will be in properly timedrelation.

It is a further object of the invention to provlde means for definingthe position of the cams of the cam sha It is a further object of theinvention to so construct the cam shaft assembly that the same may bebodily removed from the motor. With the above and other objects in view,reference is had to the accompanying drawings, in which Figure 1 is avertical sectional view of the forward portion of an internal combustionmotor constructed in accordance with the present invention, and

Fig. 2 is a detail plan view of the cam shaft indicating means.

eferring more particularly to the draw- 5 designates the crank case ofthe motor, and 6 designates the crank shaft thereof. Secured to thecrank shaft 6 is a driving gear 7 and mesh mg with the driving. gear 7is a driving 8 carried by a vertically extending 9 is mounted with m ahousing 10 and the lower end of said housing 10 carries a bushing 111921. Serial No. 474,428.

in which is mounted a bearing 12 for the lower end of the shaft 9.Mounted upon the upper end of the shaft 9 is a driving gear 13 and saiddriving gear 13 meshes with the teeth 14 of a gear 15 mounted upon thecam shaft 16. The gears 13 and 15 are mounted within a housing 17 andthe cam shaft 16 is mounted within a housing 18. Mounted in the housing17 is a bearing 20 for the upper end of the shaft 9. The gear 15 isprovided w th two sets of teeth 14 and 21 and the teeth 21 mesh with agear 22 carried by the shaft 23 upon the outer end of which is mounted acooling fan 24.

By this construction it is apparent that during the operation of themotor, through the medium of the gears 7 and 8, the shaft 9 will bedriven, and through the medium of the gears 18 and 15, the cam shaft 16and the fan 24 will be rotated.

y The upper portion of the housing 17 is provided with a window openlng25, and mounted in said window opening 1s a window 26 formed of anysuitable transparent material.

' Mounted upon the periphery of the gear 15 is a plurality of indicators27, and eachof said indicators will carry a mark of identification to behereinafter more specifically referred to. Projecting inwardly of thehousing 17, is a pointer 28 and said pointer 28 is adapted to coincidewith the indicators 27 as the same pass the pointer.

The device operates in the following manher:

In the drawing the motor is shown with the piston 40in the No. 1cylinderi indicated by the reference character 41 in the position knownas top dead center. I With the several parts in this position, it willbe seen that one of the indicating elements 27 is immediately below thepointer 28 and this indicating element would be identified by the legendNo. 1, top dead center.

Assuming now that the entire cam shaft assembly has been removed and itis desired to replace the same upon the motor with its several parts inproper timed "relation to the crank shaftthereof: To accomplish this,

the crank shaft of the motor is rotated until the piston 40 in the No. 1cylinder 41 is at the top dead center, which position will be indicatedby the legend No. 1, top dead center on the fly wheel of the motor as isthe common practice. After .this has been done,

the camshaft 16 is rotated until the indicating element 27 carrying thelegend No. 1, top dead center coincides with the pointer 28.

If now with the parts in the positions de- I scribed, the cam shaftassembly is positioned upon the motor, be in proper timed relation,present instance the used to illustrate the operation of the device,

the several parts will and while in the 1 it is obvious that the gearwill have a number of indicating elements 27 corresponding to the numberof cylinders employed, and that when this is the case, the

cam shaft assembly may be timed with any 15 of the cylinders desired.

From the foregoing it is apparent that the present invention provides anew and novel means for accurately timing the cam shaft and crank shaft,thus eliminatin the heretofore tedious operation of making timing testsin the assembly of motors.

I claim: 1. In a'cam shaft assembly, a cam shaft, a housing, saidhousing beingprovid No. 1 cylinder has been ed with a window, a drivinggear for the cam shaft and having a proper timing of the cam shaft ingmechanism.

3. In combination with an internal combustion motor cam shaft and itsassembly, a window provided in the housing, a stationary pointer carriedby the housin and means carried by the cam shaft riving means andadapted to coincide with said pointer to indicate the position oflthecams of said cam shaft relative to the remainder of'the motor.

vrcron w. PAGE.

